反应详情

A suspension of 1.25 g of 1-hydroxycyclobutene-3,4-dione (A) in 10 ml of absolute n-butanol and 15 ml of benzene is heated to reflux in a Soxhlet apparatus. A passes slowly into solution. The water of reaction is bound to the molecular sieve 4A which is present in the apparatus. The reaction mixture is concentrated after 2 hours. The distillation of the residue at 105°-115° C/0.01 Torr yielded 1.6 g (=82% of theory) of 1-n-butoxycyclobutene-3,4-dione as a yellowish oil.

1. temperatureis heated
2. temperatureto reflux in a Soxhlet apparatus
3. concentrationThe reaction mixture is concentrated after 2 hours
4. distillationThe distillation of the residue at 105°-115° C/0.01 Torr